Fresa G024, Руководство по обслуживанию

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MECHANICAL OVERVIEW 31 March, 1999
1-8
1.2.4 DEVELOPMENT UNIT BIAS VOLTAGES
Each development unit contains a supply roller and a development roller. These
rollers are conductive. The voltage applied to the supply roller (SB) depends on the
process control results. The other voltages in turn all depend on SB, as described
below.
SB (supply roller bias)
Default: -348 V
Range: -218 V to –468 V
BL (development blade bias)
This is always SB – 132 V. If SB changes, so does BL.
Default: -480 V
180 Vac is always super-imposed over this voltage.
B (development roller voltage)
This is always SB +68 V. If SB changes, so does B.
The development roller voltage (B) is the V
B
determined during process control.
G024V663.WMF
Supply roller
Development
roller
OPC belt
Development blade
Toner
180 VAC equivalent
BL = –480 V
SB = –348 V
68 V
BL = –480 V
AC180 V
(400 Vp-p)
2 kHz